SU1666712A1 - Method for development of mineral beds - Google Patents

Abstract

The invention relates to the development of coal and salt deposits. The goal is to reduce the labor intensity of the cleaning works. In the block, contouring openings and connections between them are made. Parallel to the direction of advancement of the clearing front from the rack along the seam, the coal of the borehole is drilled for the entire length of the block at a distance from one another of the most stable span of the main roof. The wells are lined with pipes of easily destructible material when passing through the intake of the chamber. The coal is dredged by chambers between the contouring workings. In the process of cleaning works form interchamber pillars. Cleaning work in the block is carried out towards the rack. After working each chamber, the interchamber pillars are removed. After the bottom of the chamber intersects each well, a guide nozzle is installed at its wellhead, and after each well passes the bottom of the chamber pillar, the filling material is fed through the nozzle into the developed space of the block and is placed in strips. The testing of each subsequent chamber was carried out with a lag from the excavation of the inter-chamber pillar of the previous chamber, equal to the product of the rate of chamber testing by the duration of the filling material feed through the well. In addition, the filling material is fed into the developed space of the block through the well nozzle by moving the nozzle in the horizontal plane in the interval bounded by angles ± α = ARCTG (A / B), where A is half the width of the filling strip

B is the total width of the chamber and interchamber pillar. 1 hp ff, 1 ill.

Description

The invention relates to the mining industry and can be used in the development of stratal deposits, such as coal and salt deposits.

The purpose of the invention is to reduce the labor intensity of the cleaning works.

The drawing shows a diagram of the clearing recess, in the plan.

The method is carried out as follows.

Initially, the contouring openings 1 and 2 are conducted along the formation. From the assembly through the formation to the edges of the block, Borehole 4 is parallel to the direction of advance of the cleaning front, they are separated from each other at a distance not exceeding the stable span of the main roof.

Wells drilled t the entire length of the block. In the assembly, the backfill complex 5 is installed with the possibility of laying a bookmark at the wellhead 4, transport lines 6 are laid along the workings 1, 2 and interconnection 3, through which the components of the bookmark are delivered to the backfill complex 5 and removed from the broken minerals. Clearing faces are formed. The cleaning works start from the edge of the block in the direction of sabotage 3, for which purpose excavation machines 7, 8 and mobile support-fencing 9 are used. At the same time, excavation machine 7 is located on one of the contour workings, and machine 8 and mobile support-fencing 9 are located at another contouring development. The machine 8 takes out the chamber between the openings 1 and 2. After the bottom of the chamber intersects each well, guide nozzles 10 are installed on its mouth from the side of the coupling 3. The nozzles 10 are oriented in the direction of the corresponding backfill array 11. During cleaning operations, pillars 12 are formed between the chambers .

After this, the excavation machine is equipped with a mobile lining 9 and the inter-chamber rear sight 12 is worked out (figure 1). At the same time, the mobile support protects the working space from spillage of the rock. After the downhole passage of the inter-chamber pillar of a well through it, the filling mixture is fed under pressure through the nozzle 10 under pressure, which, ejected from the nozzle 10, forms and seals the backfill array 11 stripes in the developed space of the block.

After the withdrawal of the bottom of the worked out column of the previous chamber from generation 2 to the distance, not less

L-t3 Vn x ..

where nz the duration of the filing of the well filling mixture;

Vn x. - the speed of the camera movement from the development 2 in the direction to the excavation 1 is made by the machine 8, the next chamber is dredged, the axis of which is shifted to the coupling 3 by the width of the inner tube 12. Due to this lag, the camera does not cross the well 4 until the end of the feed him filling mixture. After the excavation machines have reached the production of 1, the mobile support-fence S is completed with the excavation machine 8 and it is used to work out the rear sight, increasing the backfill array 11. The excavation machine 7 is shifted to the coupling 3 by the rear sight 12 from the axis of the previous chamber and the next excavation is made cameras, observing the required lag from the pillar being worked. Then the cycle repeats.

To maintain the cross-section of wells 4 and reduce the resistance to the movement of the mixture, they are cased, for example, with polyethylene pipes 13, which are easily broken when the bottom passes. To obtain the required width of the filling strip, the nozzles 10 are moved in the horizontal plane in the interval defined by the angles

± a arctg (a / b),

where a is half the width of the stowage strip 11;

b - the total width of the chamber and between the chamber pillar 12,

Claims (2)

1. A method of mining mineral deposits, including conducting contour workings in the block and slinging between them, drilling wells along the formation parallel to the direction of advance of the cleaning front, clearance of mining faces, excavation of minerals between the contouring workings, formation of pillars between the chambers during cleaning work, the subsequent development of the pillars and the laying of the developed space with backfill material, which is due to the fact that, in order to reduce the labor intensity of the cleaning works, boreholes are carried out over the entire length of the block being worked at a distance not more stable than the main roof from each other, the wells are cased with pipes from the material that is easily destroyed during the passage, the cleaning works in the block lead to sledging, after each chamber is worked out the recess between the chamber pillars, while after the bottom of the chamber intersects each well, a guide nozzle is installed on its wellhead, and after each well passes through the bottom of the chamber pillars along it from the stand through The loading material is fed into the developed space of the block and placed in strips, and each subsequent chamber is processed with a lag from the previous chamber chamber notch, equal to the product of the camera working rate and the duration of the filling material feed through the well. 2. Method according to claim 1, characterized in that the filling material is fed into the developed space of the block through the well nozzle by moving the nozzle in the horizontal plane in an interval defined by the angles ± a -arctg (a / b), where a is half the width of the filling lanes, b - total width of the chamber and interchamber pillar. ////// J / 7 /// 4. . h 8 8 tYaYa% I $ ZAO & g g l Ј7 C