SU699194A1 - Support for conjugating longwall with drift - Google Patents

Description

(54) LAVA STRETCHING STRESS WITH STRETCH

one

The invention relates to the mining industry and can be used in the development of steep coal seams using mechanized roof supports.

Known support mating, including the drift and overhead parts. The drift part of the lining consists of two sections having upper and hydraulic jacks of movement. The overhead section also consists of two sections, each of which includes a ski, hydroracks, tops and side shields. One of the sections has a support with a window in which the support of the second section of the overhang part of the support 1 moves along the strike.

The disadvantage of this support is that the support of one of the sections of the overhang part of the support has only a longitudinal window for shifting the support. Such a combination of supports of two sections requires straightforward development. The expansion of the sections of the overhang between the kidney and the roof by means of hydraulic structures located in one row and at an angle to the soil is unsafe, since with the removal of the thrust into the working side, the support sections may fall.

The closest technical solution to the invention is a lining mating with shchrek, including schtrekovy and nadalnyh parts, pivotally interconnected, containing hydroracks with supports, connected in pairs, traverse, longitudinal beams and support base 2. The disadvantage of such lining is that Then the supports of the hydraulics of each section are located in one row along the strike and are supported on a flat base. Availability

At each section of the base, located along the strike, it excludes the possibility of using such lining mates when machining steep seams with mechanized lavas, since a slight change in the berm width of the berm in the superstructure requires maneuvering with hydraulic posts in the transverse direction while maintaining the strength parameters of lining mats and reliable maintenance of the roof working out.

Claims (2)

The purpose of the invention is to ensure the stability of the support when changing the angle of dip and the curvature of the workings by moving the girders across the strike. This goal is achieved by the fact that the support bases are made in the form of ducts with corrugated surfaces and notches, inside of which there are supports of hydro-posts, which have fluted surfaces for interaction with the fluted surfaces of the duct. FIG. Figure 1 shows the coupling support in the intermediate drift of the mounting layer under the CHP system; in fig. 2 - time, cut A-A in FIG. one; in fig. 3 shows a section BB in FIG. 2; in fig. 4 shows a section B-B in FIG. 3. The coupling support has longitudinal beams 1, traverses 2, hydraulic legs 3 and 4 on the lower and lying sides, box support bases 5, support licenses 6, travel hydraulic cylinders 7, rear fence 8, expansion cylinders 9. Inside support base 5 parts of the support are located: a support 10 with a corrugated sole, connected by an axis 11 to a hydraulic cylinder of movement 12, which is installed in a saddle 13 and connected by an axis 14 to a support base 5, a connecting axis 15, a corrugated rail 16, attached to the bottom of the support base, and limiters 17 lifting support. Bearing 10, the engagement with the corrugated rail 16, provides a rigid fixed position of the hydroresistance 3. The lining of the mating lava with the tongue works as follows. When changing the width of the soil of the shtrek, for example, decreasing, reliable maintenance of the interface and stability of the overhead part of the support against sliding into the lava during operation of the excavation machine suspended to it, is provided by changing the position of the support base along the width of the drift and the angle of the hydraulic pillars. Before shifting the mating, the hydraulic cylinders 7 remove the strut of the girders 3 and 4 of one of the two sections of the front part of the lining. The working fluid is supplied to the rod cavity of the hydraulic post 3 under pressure, and the rod moves upwards, disengaging the support 10 from the corrugated rail 16. As soon as the support 10 rises to the stops 17, the working fluid in the rod cavity of the hydraulic post 3 stops. The working fluid is supplied to the piston cavity of the hydraulic cylinder 9 under pressure, and the support of the hydraulic column 4 together with the support base 5 moves to the lying side of the drift. The hydraulic column 4 extends between the cross beam 2 and the base 5, and the hydraulic cylinder 9 lies between the cross beam 2 and the hydroresistant 4, pressing the cross bar 2 with the longitudinal beams 1 to the upper liner, forming a hard force triangle in the plane of the cross section. Then, the working fluid is supplied under pressure to the piston cavity of the hydraulic cylinder 12 and the hydraulic post 3 together with the support 10 is moved to a position that ensures the stability of the coupling. The hydraulic post 3 is expanded, and its support 10 engages with the corrugated rail 16. The second section is moved in the same way and its supporting bases 5 are installed. Thus (longitudinal beams) 1, traverse 2, hydraulic posts 3 and 4, the supporting base 5, the hydraulic cylinder 9 when thrusting, the girders form a stable volumetric power structure with geometrically varying shape and dimensions, which maintains optimal power parameters when the mining conditions change. The use of support mating in the mechanized mining of steep seams allows to reliably maintain the roof of the mine for mating with the change of mine technical parameters of the bottom, reduce the accident rate of mining, increase the speed of the lava movement. Claims of lava-sandwich mating, comprising schtrekovye and overhead parts, pivotally interconnected, containing hydrorails with supports, connected in pairs, traverses, longitudinal beams and supporting bases, so as to ensure the stability of the support when changing the angle the fall of the reservoir and the curvature of the workings by moving the girders across the strike, the supporting bases are made in the form of boxes with corrugated surfaces and cuts, inside which are placed the supports of the girders, which grooved surfaces to interact with grooved duct surfaces. Sources of information taken into account during the examination 1. USSR author's certificate No. 450889, cl. E 21 D P / 36, 1972. 2. USSR author's certificate number 471455, cl. E 21 D 11/36, 1973.