RU2231647C1 - Section of lining for supporting a breakage face of a steeply inclined coal seam - Google Patents

Abstract

FIELD: coal mining.

SUBSTANCE: the invention is dealt with breakage faces of steeply inclined coal seams and may be used in coal and other minerals mining from the steeply inclined coal seams. The task of the invention is to increase efficiency of support of a working space of a the working face at the expense of deceleration of broken coal transportation speed caused by gravity along a working face. A section of lining for supporting of a breakage face of steeply inclined coal seams contains an overhead cover with a deflector, hydraulic props, fences, hydraulic jacks of shifting and the base. In the base working face butt there is a groove, in there is a speed suppressor fixed coaxially to the base with a capability to turn both sides in the base plane. The suppressor of speed contains the vane made in the form of a metal lattice, and hollow boom, inside which one part of a spring is installed. Its) other part is rigidly linked with the base. The length of the speed suppressor is no more than the length of the deflector of the lining section. The vane is oriented in parallel to the axes of hydraulic props, its height no more than half of height of the lining section, and sizes of the lattice meshes are no more than a size of an average piece of broken coal.

EFFECT: the invention allows to increase efficiency of support of a working space of a the working face.

5 dwg

Description

The invention relates to mining, in particular to supports for treatment faces of steeply inclined seams during coal mining according to the development system “Long posts along strike”.

A known unit for the development of steep coal seams of medium power, containing various elements for securing the roof, feeding a mining machine to the face, separating coal from the array, frontal movement [1]. The disadvantages of the unit are increased sensitivity to changes in the length of the face due to deviations in the parallelities of the preparatory workings, metal production, clutter of the working space of the face by the elements of the unit, but it is precisely the clutter of the working space that ensures a decrease in speed during gravity transport of broken coal to the lower part of the lava.

The support was adopted as a prototype for maintaining the working space during the development of steeply inclined and steep bedding, containing a base, hydraulic struts, overlap, guards and means of transportation [2].

The disadvantages of the prototype are:

- increased risk of dynamic effects of pieces of coal on the elements of the lining sections during gravity transport of broken coal along the lava due to the lack of speed quenching devices;

- inconsistency of this lining section with the current “Safety Rules for Coal and Shale Mines,” which, when developing formations that lie at an angle of 25 degrees or more, have a means of damping speed during gravity transport. These shortcomings, in our opinion, sharply reduce the scope of this lining and the efficiency of maintaining the working space of the working face.

The purpose of the invention is to increase the efficiency of maintaining the working space of the face of a steep and steeply inclined bed by equipping the lining section with damping speed of gravity transport of beaten coal along the face.

This goal is achieved by the fact that in the lining section to maintain the face of a steeply inclined coal seam containing an overlap with a visor, hydraulic racks, guards, hydraulic jacks and a base, a slot is made in the bottomhole end of the base, in which it is aligned with the base, with the possibility of rotation in both side in the base plane, a speed damper is fixed, which, in turn, contains a blade and a hollow rod, inside which one part of the spring is installed, the other part is rigidly connected to innovation, and the length of the speed damper is not more than the length of the visor of the lining section, the blade is oriented parallel to the axes of the hydraulic struts, and its height is not more than half the height of the lining section.

The invention is illustrated by diagrams. Figure 1 shows the lining section in the face (side view); figure 2 - installation diagram of a speed damper; figure 3 is the same (plan view); figure 4 - layout of the linear sections of the lining in the face (plan view); figure 5 - the same when the damper is triggered by one of the linear sections of the lining.

The lining section for maintaining the working face of a steeply inclined coal seam contains an overlap 1, hydraulic racks 2, a bottomhole 3 and a block 4 fences, a base 5, a speed damper 6 and hydraulic jacks for moving.

The speed absorber 6 contains a blade 7 and a rod 8. A vertical hole 9 is made in the bottomhole part of the base 5 of the lining section, and a slot 10 is made at the end of the bottom side of the bottom 10. A hollow rod 8 of the damper 6 is introduced along the axis of the base along the axis of the base 6. One is inserted into the hollow rod the end of the spring 11, and its other end is fixed in the base 5. By means of the finger 12, the damper 6 is connected to the base 5 with the possibility of rotation in both directions in its plane. The damper is oriented so that the long edge of its blade touches the soil of the formation, and the short one is parallel to the axis of the hydraulic strut. In this case, the blade can be made in the form of a metal grate, the height of which is taken no more than half the height of the lining section; the length of the absorber is taken no more than the length of the visor, and the size of the cell lattice - no more than the size of the average piece of chipped coal.

The lining sections are installed along the entire length of the working face close to each other, orienting them with speed dampers in the direction of the working face so that the visors of the supporting sections rest against the face. In this case, between the face and the speed dampers of each lining section, there should be a gap sufficient to accommodate the traction and safety ropes of the shearer in it. Coal mining is carried out by a shearer moving from bottom to top. In this case, the movement of the lining sections is carried out after the combine. Chipped coal is transported by gravity to the bottom of the lava. One part of the flow of chipped coal enters the blade 7 of the damper 6 of the lining section, located below the executive body of the combine, and the other (smaller in volume) by gravity in the space between the speed damper and the face is transported along the lava. Due to the slope of the face line towards its mining, the damping of the speed of this other part of the flow of beaten coal occurs due to friction on the soil of the formation and on the face. Part of the coal trapped on the damper blade, as the combine moves, increases in mass. At the moment when the gravity of the mass of broken coal on the blade becomes greater than the force of the spring 11, the damper will rotate around the axis of the finger 12 - the beaten coal will fall from the blade to the bottom, and the damper will return to its working position. From contact with the face, chunks of coal with high kinetic energy will bounce and fall onto the damper blade of the support section installed below, etc.

After the extraction of the strip of coal, the combine is driven to the lower part of the lava. At the same time, the combine with its body acts on the damper of the nearest support section, turns it - the coal lying on the damper blades falls off from it. As the combine moves to the lower part of the lava, the damper blades of all sections of the lining will be unloaded, and after the combine’s executive body is put into a niche, all damper will return to their working position.

Thus, due to the installation of a dampener for the speed of the transport stream, the lining section will be protected from dangerous dynamic effects from the side of the broken coal; the condition of the Safety Rules is met, i.e. the efficiency of fastening the working face of a steeply inclined coal seam will increase, and this is the purpose of this invention.

Sources of information

1. Zhigalov M.L. Technology, mechanization and organization of underground mining: Textbook. for universities / M.L. Zhigalov, S.A. Yarunin. - M .: Nedra, 1990, p. 290, Fig. 3.16.

2. In the same place with. 284, Fig. 3.14 (prototype).

Claims (1)

A lining section for maintaining the working face of a steeply inclined coal seam, comprising an overlap with a visor, hydraulic racks, guards, hydraulic moving jacks and a base, characterized in that a cut is made in the bottom face of the base, in which it is aligned with the base, with the possibility of rotation in both directions in the plane of the base, a speed damper is fixed, which, in turn, contains a blade made in the form of a metal grill, and a hollow rod, inside which one part of the spring is installed, the other part of it part is rigidly connected to the base, and the length of the speed damper is not more than the length of the visor of the support section, the blade is oriented parallel to the axes of the hydraulic struts, its height is not more than half the height of the support section, and the size of the lattice cell is no more than the average piece of beaten coal.

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