SU857488A1 - Method of mining potassium outburst-hazardous seams - Google Patents

Description

(54) METHOD FOR DEVELOPING POTASSIUM EMISSIBLE

PLASTES

I

The invention relates to the mining industry and can be used in the underground development of complex outburst potash strata of complex structure.

There is a method of continuous development of powerful gently dipping seams, including a layer-dredging of the seam from the bottom upwards with a bookmark of the worked-out space and the forging of the roof manually 1.

The disadvantage of this method is the low safety of working conditions at the excavation when developing outburst formations due to high stresses transferred to the outburst formation by the main roof during shrinkage of the bedding in the course of reservoir mining.

There is a known method of developing potash outburst formations, which include simultaneous mining of a mineral in a mine floor in two layers, with each layer worked by a long clearing face with an advance, leaving the upper layer and leaving a layer in the developed space between these layers 2.

The disadvantage of this method is the low safety of cleaning operations in the presence of a waterproof layer in the gas-bearing rocks of the main roof due to the severe deformation of covering rocks during mining, the drive of the fracture to the water-impermeable horizon and the threat of water breakthrough in the mine.

The purpose of the invention is to improve the safety of cleaning works in the presence of a waterproof layer in the gas-bearing rocks of the main roof.

The goal is achieved by the fact that the lower layer is tested by chambers located parallel to the refining line of the upper layer, while

15, the advancing of the upper layer with respect to the lower one is taken to be equal to the distance, the time of working out of which ensures the degassing of the rocks of the main roof.

FIG. 1 shows the reservoir being worked out in the plan; in fig. 2 - section aa

20 in FIG. one.

The proposed development method is carried out in a straightforward manner.

Separate preparation of the upper I and lower 2 layers for excavation is carried out. The development of the upper layer 1 is made by a long clearing face 3 at full capacity by controlling the roof 4 with a full collapse. Collapse of roof rocks creates the possibility of gas flow (degassing of rocks) towards mining along broken rocks 5 and further into the mine workings, which ensures complete degassing of the lower layer and its normal ventilation during mining. The lower layer 2 is processed simultaneously with the upper layer by chambers 6 parallel to the clearing bottom line 3 of the upper layer, leaving the pillars 7 between them, which are also parallel to the specified face 3. The arrangement of the pillars 7 parallel to the clearing bottom line allows the pillars 7 to be evenly loaded as collapsed rocks of the front of the cleaning works and as the pressure on the crushed rocks stabilizes on them, which increases their stability and eliminates their sharp collapse, which can lead to the disturbance of the impermeable horizon and breaking water into the mine. In addition, working out the lower layer with chambers provides (under unloading conditions) gradual and uniform destruction of the inner-chamber pillars, smooth lowering of the overburden without destroying their continuity, which prevents disruption of the aquifer and eliminates the risk of flooding the mine continuous vyge.mkomu mineral fossil long cleaning face and roof management complete collapse. m, permissible according to safety standards from water breakthrough into the mine.

The upper layer I is worked in advance to the lower layer 2, and the advance and between the indicated layers is taken to be equal to the distance, the working time of which

provides the degassing of the rocks of the main roof.

Testing the lower layer with chambers located parallel to the clearing line, advancing the upper layer with respect to the lower layer, equal to the distance, the working time of which ensures the degassing of the rocks of the main roof allows achieving complete degassing of the rocks without introducing special measures and eliminating disturbance breaking water into the mine.

Claims (2)

1. A method for developing potash reservoirs of hazardous layers, including the simultaneous mining of a mineral in a mine floor with two layers with advanced excavation of the upper layer by a long clearing face and leaving a layer in the developed space between these layers, characterized in that increasing the safety of cleaning operations in the presence of a waterproof layer in the gas-bearing rocks of the main roof, the lower layer is being worked out by cameras located parallel to the clearing face line Top layer 2. A method according to claim I, characterized in that the advancing of the upper layer with respect to the lower one is equal to the distance, the working time of which ensures the degassing of the rocks of the main roof. Sources of information taken into account in the examination 1. Andreyevich A.N. Development of potash and rock-salt deposits, part f, Goskhimizdat, 1953, p. 67-68. 2. Zilbershmidt V. G. and others. Technologists of underground mining of potash ores. 1977, M., “Minerals, p. 47-49. Silvinit Kamenna Salt X. - L + 4 - - - - I - K / H / y CHAXXXXXX  4- .. + og VV