SU1627708A1 - Method of supporting mine workings - Google Patents

Abstract

FIELD OF THE INVENTION The invention relates to mining and is intended to secure and protect underground mine workings (HS). The goal is to increase the holding capacity of the marginal zone of the GW. For this purpose, the roofing and soil of the air-boring agent is fanned to the hole of the air-borne wall to the depth of the hardening zone. Along the contour of the HS, the holes are evenly distributed, and the angle a. the expressions a 2 arcsin (y-hy (. Xl) :( 2d-P) are defined between them, where d is the diameter of the hole, m, / is the distance between adjacent holes, m, / 1 the thickness of the reinforcement zone, m, P rgmnina between rock pressure and pressure developed by the self-expanding mixture (CPC), MPa, y is the average pp of rocks. MPa / m. CPC is inserted into the drilled holes, and anchors are introduced as a result of the CPC hydration reaction, it expands and large longitudinal-spaced forces are developed in the well that act on the bore holes and secure the anchor with HB rocks. The angle of inclination of the hole is Chiva increased concentration of the targeting for holding roof rock and soil from peaking and improves contact with the roof rock bolt support 2 yl, 1 tab. i (L

Description

FIELD OF THE INVENTION The invention relates to mining, in particular, to methods of securing and protecting underground mine workings.

The purpose of the invention is to increase the carrying capacity of the marginal zone of production.

At (rig. 1, the mine workout is shown, the cross section; FIG. 2 is a drilling pattern.

The method is carried out as follows.

Into the roof 1 and the soil 2 of the mine workings, 5 with a fan and a hole 4 directed to its contour with a depth of L. diameter d, at a distance of / and under the edge to each other, and then filled with a rapidly hardening samorasshiry shuh mixture of LDCs 5 placed in soft shells 6 in the form of ampoules

(cartridges, capsules), consisting of 2 parts: in one liquid initiator 7, and in the other - dry powder HPC 8, which is broken by a polymer screw anchor 9 installed in the well with sealer 10 at the base.

The calculation is carried out as follows.

Given the values of d, l for a certain h. by the formula (1) is the angle a; According to the formula (2) the number of holes in the hole. If it is not performed, a lower value of / is chosen and the calculation is repeated.

The calculation algorithm is as follows.

&

where a is the angle between adjacent holes, degrees;

a 2artsiri

oh

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/ 1 i YOUNG SPINS 1FOCh1K NII M

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many of its workings m

Rite between three davshnism

and the phenomenon of the mixture being developed

IR

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won c i. fine (For example, inna 14 and 11 (i pc i i 7 i and (horny u u dot

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OG XlplKHIll 11IK M (|) O i. l | SE 1I AND SOIL AND AND 1BI I 1 about 1 | ЫЧ I 4,1 V ip I4IK ПНИ)) H I I TDK ip HH iO U 1 H I R 1OO 1 1.0 I i 11YAN) 1M 1

in t with | om1 IM IIP. / KI1KIM write, orom M prtchp ia) and with pit np them nosho si oil bout iui and i p) w oi with i IK iiii s / c shch (K (b. oi loii iKoi pa iBiinat mine mine nis not (W) o s my yongchi KOI .as but laoin

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Data h hms1TS1K) g in scna

FATTERS 4 IIMIIOHI1 H K1 D L HELP KY-L

i i i i u i i 14 iu i with t

d i i ii i i with Y h i -Kin with i IH in ivanp

on the bolt-on screw anchor 9 with the help of a brooming blade (wire drill bit or ram with a sealer 10 in the base of Hoc, i.e. over time (20–30 min) in the rep staff of the reaction guide

In the mixture of HPCs, it expands and barrels develop in this sandstone. prodotno raikfnye syi 1 and cheistvushyushis on the walls (. books (u 1000 Ki / cm) and blocking anchor with Jyioi

siiKioiia SK1MINA 4 carry 1 ip iaa kataems so that outwardly teflc from the standings of them and them t you need to provide a concentration on the chain with the U p / cano poro 1 blood in oi waking and por I soil I have done a letter. in koshuta with anchor kriyu por ii digs -) g (leads to a sharply smaller stump i pv ability to work ibid II h from i with iin / fr to ki pic ga vt pt others with kva

0 WINE AND IIOBI lilt HHiO HGINVOS P llpt P K Research Institute

1 press operation weight for the operation to i io and be 3 | to montnum by i, and j to get the result of the work out 1 to 1 m of Mieia u i poxo inee km o peak ia (t.iiio shsie ny amp You can go with the LDCs and v. i shots aii rnoi kps pi and you can see i e oi i h) eriiioBKe arch support) which can be reduced (1 to mpa 1 roho 1ki and crepe iennvi aooi K, I

° 0

) / "I / w n toopt i with nick

(Yueo p tpzhanin first vyraboiz nk 1yuch, 1 scuzzy fan crown of grass ien Shn in relation to the development of feathers on the i th panel of the zone other le n i m r (the neck of self-expanding mixture and the introduction of anchors oi schanm PI TIM) not n. to increase not from the neck of the eiiocotmoc and the near zone of the development of the ϕnry evenly C p, cii (i.e. by snoM vi on Mi w u them oupt ie 1I1 of

At shya

2p

45

i u a i (xi was okay

mi gra i L, rehn p yuoet Yuonikh i oro i

Pa m OQh Goptsina zone read m

Haemorrhage between 1 second uinvpa m and m

4 diameter diameter | and m P is the difference between the interplaces of the mountain tap, ie, by the scattering of the gap 55L avonae of the pulp bailing with a mixture of Ila

Dependence of pressure developed on the percentage of LDCs in the mixture

FIG. 2

Claims (1)

Claim A method of maintaining mine workings, including drilling a fan of oblique in relation to the contour of the drilling of holes to the depth of the thickness of the hardening zone, pa (interfering with them a quick-hardening self-expanding mixture and introducing anchors, characterized in that, in order to increase the bearing capacity of the near-well working area, the holes evenly distributed along the contour of the mine, while the angle between them is determined from the expression ι de а the angle between adjacent cords. γ average density of goon rocks, MPa m. h is the thickness of the hardening zone, m; ί distance between adjacent boreholes and, m: d hole diameter, m; P is the difference between rock pressure and pressure developed by a self-expanding mixture. MPa The dependence of the developed pressure on the percentage of LDCs in the mixture LDC 7 1 s I 1 eleven 1st 1st 1 about 1 eleven thirty 40 fifty 60 [ 1 eleven eleven 1 about 1 eleven eleven eleven L. 1 80 eleven 1 s? 1 eleven eleven eleven 1 i 100 Pi, kg / cm ¹ 100 280 4SU 550 720 830 920 970 1000 1000