SU1810567A1 - Blast-protection guard of powered support - Google Patents

Description

The invention relates to the mining industry, in particular to the fastening of workings during the extraction of hard ores using the explosive method of breaking and loading the ore mass with a scraper device.

The purpose of the invention is to improve the efficiency of the support in the explosive method of breaking strong minerals with the provision of scraper loading of the rock mass loosened by the explosion.

FIG. 1 shows an even section of a powered support with an explosion-proof fence, side view; in fig. 2 rotated section A-A in FIG. 1; in fig. 3 - odd lining section with explosion-proof enclosure; in fig. 4 - rotated section b-b in fig. 3,

Explosion-proof fences of alternating even and odd sections of powered support contains simultaneously alternating upper suspended and lower shields. The even section (Fig. 1) contains the upper shield 1 suspended on the floor 2 and the lower shield 3 fixed with the latch 4 on the front hydraulic prop 5. The odd support section according to Fig. Z contains the upper shield 6 suspended on the floor 7 and the lower shield 8, fixed with the latch 9 on the front hydraulic prop 10.

The side parts of the shields 1 and 3 of the even-numbered support sections are bent and made with side bends 11 and 12 towards the front hydraulic props 5 and, thus, are located behind the side parts of the straight shields 6 and 8 of the odd-numbered sections. The latch 4 (9) can be made in the form of a sleeve 13, with a stopper 14 fixed on the sliding part 15 of the rack 5 (10) through diametrically opposite holes 16 and 17, the diameters of the holes 16 and 17 are larger than the diameter of the stopper 14, which ensures the limited rotation of the shield 3 ( 8) around the vertical axis of the rack 5 (10).

The upper shields 1 and 6 at the bottom rest on shields 3 and 8. Both the upper and lower shields are installed in the longwall with a spacing of the support sections L.

The explosion-proof fencing of the powered support works as follows.

Before the explosion, the even and odd sections of the powered support alternating with each other with their shields of the same name are installed in one line along the face. At the same time, to obtain a practically imperfect line, the possibility of a limited rotation of the shields around the vertical axis of the front struts 5 and 10 and the presence of bends 11 and 12 of the shields 1 and 3 are used, which, with overlapping I, go behind the straight shields 6 and 8 and contact them, form a gap-free fence slaughter. All this makes it possible to keep the loosened ore mass between the face and the shields after the explosion and to protect the support elements: sleeves, distributors, etc. from the impact of a shock wave and pieces of ore mass thrown out by the explosion.

After blasting, the ore mass is loaded using a scraper unit. At the end of loading, the support is moved, for which, first, the odd-numbered support sections with straight shields b and 8 move, and then the even-numbered support sections with shields 1 and 3 are moved to them.

To increase the mutual interaction of the limbs 11 and 12 of the upper 1 and lower 3 shields are made so that the size 1_r between the limbs 12 of the upper shields 1 is greater than the size Li between the limbs 11 of the shields 3. i.e. I_2> Li, in other words the L2 dimension is the spanning Li.

The proposed design of the explosion-proof fence ensures high-quality isolation of the working space of the face during the explosion and reliable protection of the lining from the impact of explosive forces, excludes the ingress of ore into the blockage through the explosion-proof fence. those. practically eliminates the loss of ORE.

Claims (1)

Claim Explosion-proof fencing of powered support, including even and odd sections, each of which contains an upper shield suspended from the ceiling and a lower shield. fixed with the help of clamps on the front hydraulic props, l and h; the general is that, in order to increase the efficiency of the lining during the explosive method of breaking strong minerals with the provision of scraper loading of the rock mass loosened by the explosion, the side parts of the upper and the lower shields of even sections are bent towards the front hydraulic props and are located behind the side parts of the shields of odd sections, and each retainer is made, for example, of a bushing with diametrically opposite holes and installed with a gap in them and diametrically opposite holes made in the sliding parts of the rack, a stopper to limit the rotation of the shield around the vertical axis of the rack. FIG. δ Editor O. Stenina Compiled by E. Fedotov Techred M. Morgental Proofreader O. Gusti Order 1430 Circulation Subscription VNIIPI of the State Committee for Inventions and Discoveries under the USSR State Committee for Science and Technology 113035. Moscow, Zh-35. Raushskaya nab., 4/5 Production and Publishing Plant Patent, Uzhgorod, Gagarina str., 101