(1) General Provisions 1. The mine (rock) column and hanging ore body retained by the design shall not be mined or destroyed without technical argument within the prescribed time limit.
2. Appropriate flood control measures must be taken for the total access to the ditch, the flat sluice, the drainage wellhead and the industrial site. The mine must establish a drainage system as designed. There should be a water intercepting ditch at the top; for mines with landslides, it is necessary to strengthen water and drainage measures; it is necessary to prevent surface and groundwater from leaking into the stope.
3. construction of structures near the mine railway across the mine railways, bridges and culverts across the roadbed or erection of wires and pipes in construction and temporary railway near the mine, are subject to prior consent of mine safety and transportation departments have agreed, and to develop construction safety measures, the Approval can be implemented. When stacking items on both sides of a mine railway or road, the distance between the edge of the piled object and the railway building shall not be less than 0.75m; the distance from the edge of the road surface shall not be less than 1m (if the road has side grooves, it shall be adjacent to the side ditch) The distance on the outside shall not be less than 0.5m).
4. The use of evidence, transportation and other mechanical equipment must comply with the regulations for the maintenance, oiling and cleaning of the rotating parts of the equipment when the equipment is in operation; when the equipment is moved, the personnel are prohibited from going up and down, in places that may endanger the safety of personnel. Any person may not stay or pass the regulations; and when the operation is terminated, the power supply must be cut off, and the water and gas valves must be closed.
(II) Mining safety requirements 1. The height of the production steps shall comply with the requirements of Table 1G432023. If the stage height exceeds the requirements of Table 1G432023, it shall be subject to technical demonstration and shall be determined by design on the premise of ensuring safety.
2. When the rig is walking near the edge of the step, check whether the walking route is safe; the minimum distance from the protruding part of the outer side of the trolley to the top line of the step slope is 2m, and the outer protruding part of the roller drill, the down-the-hole drill and the steel rope impact drill to the step The minimum distance of the top line of the slope is 3m.
3. When two or more excavators work on the same platform, the distance between the excavators: when transported by automobile, it should be no less than 3 times of its maximum digging radius and should not be less than 50m; when transporting by locomotive, it must be no less than two The length of the train. 
4. In case of any of the following circumstances, effective safety measures shall be taken in advance to deal with the slope of the stope to prevent the collapse of the stope and the slope of the slope:
1) The rock formation is inclined to the stope, and the design slope angle is greater than the rock slope.
2) There are multiple sets of jointed, fractured space combined structure in-plane dip.
3) A slope with a large weak structural surface cutting slope and an unstable potential landslide body.
Tower Crane Parts:
Tower Crane Parts is mainly includes mast section, tower crane cab room, lifting mechanism, rotary mechanism, trolley mechanism and safety limit device. It is characterized by creative design with reliable operation and rational structure.
With various practical devices such as arm-trolley radius-changing mechanism, horizontal arm bracket and hydraulic self-propelling mechanism as well as a variety of safety devices, Tower Crane Hoist Brake Coupler enjoys excellent performance in speed control, work efficiency and operational stability.
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