Chapter II Safety Management of Tailings Pond

Article 8 The enterprise manager is the first person responsible for the safety production of tailings pond, and shall designate or set up corresponding institutions within the prescribed authority to implement the safety requirements of tailings pond, organize the formulation of rules and regulations suitable for the actual situation of the unit, and equip professional and technical personnel or personnel with practical working ability to be responsible for the safety management of tailings pond to ensure the funds needed for safety production.

The main responsibilities of the ninth enterprise tailings facilities safety management department:

(a) to implement the national guidelines, policies, regulations and technical specifications on the safety production of tailings ponds;

(two) the preparation of tailings safety annual plan and long-term planning and organize their implementation;

Prepare rules and regulations on safety production of tailings pond and check the implementation;

Prepare emergency plans for various disasters and organize drills;

Responsible for the collection, analysis, preservation and sorting of technical data;

(six) according to the relevant provisions of the examination and approval and approval of tailings design, construction and testing projects;

(seven) to organize the implementation of tailings safety hazard management;

(eight) responsible for the emergency rescue and engineering rescue of tailings ponds, and report to the relevant safety production supervision and management departments in time when major hidden dangers and dangers are found, and report to the local people's government and relevant departments for assistance in case of emergency;

(nine) the organization of tailings safety management personnel training.

Tenth tailings workshop, section or team main responsibilities:

Conscientiously implement the instructions and tasks issued by superiors;

Establish and improve the safety management system of tailings pond facilities;

(three) the preparation of annual and quarterly operation plans and detailed operation charts, and the overall arrangement and implementation of tailings transportation, classification, dam construction and flood discharge management;

(four) daily inspection and observation, found unsafe factors, should immediately take emergency measures and timely report to the superior;

(five) timely and comprehensive records of the safety inspection and monitoring of tailings facilities.

Eleventh enterprises must do a good job in tailings concentration and classification, ore drawing and dam construction, backwater drainage, flood control and earthquake resistance and other safety inspection and monitoring work. In strict accordance with the requirements of design documents and relevant technical specifications.

Twelfth without the approval of the technical demonstration and production safety supervision and management departments, no unit or individual may arbitrarily change the following matters related to the safety of tailings pond:

(1) Dam road:

(2) Dam type, slope ratio outside the dam and final dam axis position;

(3) the setting of seepage-proof drainage filter layer of dam body;

Type, layout and scale of flood drainage system;

(five) tailings, waste or waste water that are not designed to enter the library.

Thirteenth enterprises must often patrol the mountains around the library and deal with landslides and abnormal phenomena in time.

Fourteenth without technical demonstration and approval, no unit or individual may engage in mining operations in the reservoir area. It is strictly forbidden to carry out activities that endanger the safety of tailings ponds, such as blasting, digging tailings indiscriminately and frying fish.

Article 15 When the tailings pond is used to 1/2 ~ 2/3 of the designed final dam height, engineering geological investigation and stability analysis shall be carried out for the tailings pond.

Sixteenth tailings pond in the final design elevation before the use of 2-3 years, should be closed design. When it is necessary to expand or build a new tailings pond for continuous production, the planning and design of the expansion or new tailings pond should be carried out in advance according to the construction period to ensure the connection between the new and old reservoirs.

Article 17 The design and construction scheme of closed tailings reservoir shall conform to the relevant national laws, regulations and technical specifications, and shall be submitted to the provincial safety production supervision and management department for review.

If the design and construction scheme of closed tailings pond has not been reviewed or unqualified by the safety production supervision and management department at or above the provincial level, the enterprise shall not carry out the construction of closed tailings pond.

Eighteenth tailings closed after the project, must be submitted to the provincial production safety supervision and management departments to organize safety acceptance, acceptance of the rear can be closed.

Without the acceptance or unqualified acceptance by the safety production supervision and management department, the enterprise shall not close the tailings pond.

Nineteenth after the closure of the tailings dam safety management by the original enterprise, the local government to implement the management of the tailings dam after the closure of bankrupt enterprises responsible units or enterprises. When the closed tailings pond is reopened or used for other purposes, it must go through feasibility design demonstration and report to the safety production supervision and management department for approval.

Twentieth enterprises must establish the following tailings management files:

(1) Construction documents and relevant original materials;

(2) organizational structure and rules and regulations;

(three) the safety technical training and certificates of special operations personnel;

Organize flood control and emergency rescue and prepare flood control materials;

⑤ Flood control and emergency measures for tailings pond;

Operation indexes and measured data of various structures in tailings pond;

(7) rectification of hidden dangers of accidents.

Twenty-first tailings dam crest elevation must meet the requirements of production, flood control, ice mining and backwater in winter.

Twenty-second tailings dam must have enough safe superelevation, dry beach length and downstream dam slope.

Article 23 Before each stage of dam filling operation, bank slope treatment must be carried out. Bank slope treatment should be recorded in concealed works. In case of spring water, well, tunnel or cave, effective measures should be taken to deal with it, and the dam can only be filled after it is inspected by the competent technical personnel.

Twenty-fourth upstream tailings dam construction method, should be evenly dispersed in front of the dam, except when repairing the dam or moving the mine pipe, and should not be arbitrarily discharged from the back or side of the reservoir. Meet the following requirements at the same time:

(1) Coarse-grained tailings are deposited in front of the dam, and fine particles are discharged into the reservoir. Large-scale slime deposition is not allowed within the sedimentary beach;

② The top of sedimentary beach should be flat;

(three) the slope and length of the sedimentary beach should meet the design requirements;

(4) it is forbidden for mud to flow laterally along the dam toe to scour the dam body;

(five) pulp shall not scour the dam slope;

(6) Ore drawing should be managed by special personnel.

Article 25 When the dam body is long, alternate ore drawing by sections shall be adopted to make the dam body rise evenly. Slope, fan-shaped slope or a large number of fine tailings concentrated at one end or one side should be avoided.

Article 26 The spacing and location of ore drawing holes, the number of ore drawing holes at the same time, the drawing time, the number of hydrocyclones used, the moving period and the distance shall be operated according to the design requirements or the operation plan. The length of the dispersed ore drawing branch pipe and diversion trough extending into the silo and the height from the beach surface should meet the design requirements.

Article 27 In order to protect the filter layer of the initial dam from being washed away by tailings water, the multi-pipe and small-flow ore drawing method should be adopted to facilitate the formation of beach surface as soon as possible, and the pulp should be led to a place far away from the dam top by diversion trough or hose for discharge.

Article 28 During the freezing period, accident period or when it is really necessary to concentrate ore drawing for a long time, there shall be no unfavorable factors affecting the stability of subsequent accumulation dams.

Twenty-ninth tailings ponds in karst development areas should strengthen the surrounding ore drawing to accelerate the formation of impermeable layer and reduce leakage and sinkhole accidents.

Thirtieth after the completion of each dam, the quality inspection shall be carried out, and the inspection records shall be filed for future reference after being signed by the competent technical personnel. Main inspection contents:

(a) The size, length, axis position and slope ratio of the dam section;

(two) the elevation of the top and toe of the new dam and the elevation of the water surface of the reservoir;

(3) Construction quality of tailings pond.

Thirty-first tailings beach and downstream dam slope can not have water pits.

Thirty-second dam slope maintenance work can choose the following measures according to the specific situation:

Building herringbone ditches or reticular drainage ditches on the dam surface;

(2) Planting grass or shrubs on the slope;

(three) the use of gravel, waste rock or hillside soil to cover the dam slope.

Thirty-third control of tailings water level should follow the following principles:

(a) under the premise of meeting the requirements of backwater quality and quantity, try to reduce the reservoir water level;

(2) When backwater conflicts with the requirements of dam safety on beach length and superelevation, the dam safety should be ensured;

(3) The waterline should be basically parallel to the dam axis.

When the actual situation of tailings pond is inconsistent with the design requirements, flood dispatching calculus should be carried out before the flood season.

Article 34 Before the flood season comes, the following measures shall be taken to do a good job in flood control:

(a) a clear responsibility system for flood control safety in production, the establishment of downstream residents on duty, inspection, evacuation plans and other systems, the formation of flood control rescue teams;

(2) Dredging reservoirs in flood retaining ditches, dam surface drainage ditches and downstream flood discharge rivers (canals); Check the safety of the flood discharge system and dam body in detail, determine the elevation of the spillway sill according to the actual situation, open all the blocking plates above the spillway sill 1.5 times the flood regulation height, remove the floating objects on the water surface in front of the spillway, and ensure the smooth flow of flood discharge facilities; A clear and eye-catching water level observation scale is set in the warehouse to indicate the normal operating water level and warning water level;

(three) prepare enough materials needed for flood fighting and emergency rescue, and implement emergency rescue measures;

(four) timely understand and master the flood season and weather forecast, to ensure that the dam roads, communications, power supply and lighting lines are reliable and smooth.

Thirty-fifth out of the reservoir water storage or greatly reduce the water level of the reservoir, attention should be paid to controlling the flow, and it is not appropriate to reduce it sharply in non-emergency situations.

Thirty-sixth tailings ponds in karst or fractured areas should control the water depth in the reservoir to prevent water leakage accidents in tiankeng.

Article 37 Without technical demonstration, conventional sub-dams shall not be used for flood control.

Thirty-eighth after the flood, the dam and flood discharge structures should be comprehensively and carefully inspected and cleaned up. When problems are found, they should be repaired in time, and measures should be taken to reduce the water level of the reservoir to prevent dam failure after continuous rainstorm.

Article 39 Spillways shall not be set on the beach surface and abutment of tailings ponds. Tailings with topographical conditions can be provided with special flood discharge channels.

Fortieth after the closure of the tailings reservoir, the drainage structures must be constructed in strict accordance with the design requirements and ensure the construction quality. Under normal circumstances, it must be blocked at the top of the Jing Zuo in the well or at the branch of the tunnel, and it is strictly forbidden to block at the upper part of the drainage well.

Forty-first tailings dam drainage facilities include drainage prism, drainage cushion, drainage blind ditch and various drainage wells. During the operation of tailings pond, if it is necessary to add or update drainage facilities, it should go through technical demonstration and be approved by the enterprise safety management department.

Forty-second drainage facilities belong to concealed works, and must be carefully selected and carefully constructed according to the design requirements, and the construction acceptance records of concealed works should be filled in in detail, and the as-built drawings should be drawn. For the construction of drainage facilities, please refer to Technical Specification for Construction of Roller Compacted Earth-Rock Dams.

Article 43 Abutment and blind ditch shall be constructed in strict accordance with the design requirements to prevent centralized leakage.

Forty-fourth during the operation of tailings pond, observation should be strengthened, and the change and distribution of escape points of dam saturation line should be paid attention to, and strictly controlled according to the design requirements.

Article 45 When abnormal conditions such as local uplift, collapse, soil flow, piping, increased water seepage or muddy water seepage are found on the dam surface, measures should be taken immediately to deal with them and strengthen observation, and the safety management department of the enterprise should be reported at the same time. If the situation is serious, it shall report to the local safety production supervision department. Forty-sixth tailings in the earthquake area, should formulate corresponding earthquake prevention and earthquake emergency plan, including:

① Emergency rescue organization and responsibilities;

(2) Measures for earthquake prevention and resistance of tailings pond;

(3) earthquake-proof and earthquake-resistant material guarantee;

(four) the earthquake emergency plan for the downstream residents of the tailings pond;

(five) on duty and before the earthquake dam inspection system.

Forty-seventh tailings original design seismic standard is lower than the current standard, must be reinforced.

Forty-eighth strictly control the water level of the reservoir to ensure that the safe beach length required by the seismic design meets the requirements of dam stability under earthquake conditions.

Forty-ninth upstream tailings, dump, reservoir and other engineering facilities, we should understand the stability of upstream construction, and take preventive measures when necessary.

Fiftieth after the earthquake, the tailings pond must be inspected and tested, and the damaged parts should be repaired and reinforced in time to ensure the safe operation of the tailings pond.