SU1114799A1 - Method for working single burst-hazardous coal seams - Google Patents

Abstract

1. METHOD OF DEVELOPING SINGLE EMERGENCY CARBON PLASTICS, including conducting panel inclined field workings, split furnace, halfway drift in the excavation section, opening the gezenkami, carrying out the formation drift and conducting cleaning works, distinguishing the surface of the fires, discharging the formations, opening the gezenkami, conducting the formation drift and conducting cleaning works, distinguishing the surface of the fires, opening the gesenkami, conducting the formation drift, and conducting cleaning works, distinguishing the surface of the fires, discharging the formation with the Gezenkami, conducting the formation drainage, and conducting cleaning works, distinguishing the fires. and efficiency of mining operations by rational time and space performance of blowout preventive measures, prior to conducting a split furnace, bed drift, geseng and cleaning works from the slope The second field development and field drift to the zone of the split furnace, the reservoir drift, gezenka and cleaning works, drill wells whose mouth is located along the axes of the workings and, starting from the zone of the split furnace, perform preventive processing of these zones, while the width of the treated zones determined by the condition B Cf + 2a, where Cp is the width of the split furnace, m; a - the width of the treatment zone for the formation contour, m; + С „+ 2а, where Сщ-width of the reservoir drift, m; CH is the niche extent, m, and the amount of preventive maintenance advances relative to treatment works is set by I using the formula L E-fVo4-t for. where E is the length of the support pressure zone ahead of the clearing intake, m / day; V (ju is the speed of advancement of the clearing flank, m / day; Vn is the speed of advancement of the front of preventive work, m / day; {- the time of use of the anti-blowout measures, day 4 2. The method according to claim 1, characterized in that after the field gateway establishes a discharge zone, and wells for CO-CO preventive treatment of zones are drilled outside the discharge zone.

Description

The invention relates to the mining industry and can be used in mining operations on formations prone to sudden emissions of coal, rock and gas.

A known method of developing a coal seam includes preparation of the excavation section by reservoir workings and conducting cleaning work in reverse, while the preparatory work is carried out separately from the cleaning, split furnaces are carried out out of communication with inclined workings, and during formation preparatory workings and split furnace are used local preventive measures from the workings in the process of their performance 1.

The disadvantage of this method is that the technology of conducting workings on the outburst-hazardous formation using local measures is very complicated, unsafe and significantly reduces the rate of penetration, the workings, because for carrying out local measures there is a special shift to perform local methods of preventing emissions of coal and gas . The limited time for the implementation of preventive processing and the impossibility of combining work on sinking and preventive measures make it necessary to apply measures that are the most productive in terms of technological operations, but less effective in terms of reliability. The facts of direct violations of the parameters of local measures due to the limited time for their implementation are well known, which generally reduces the safety of tunneling works and the pace of workings 1.52 times.

The closest to the invention to the technical essence and the achieved result is a method that includes carrying out panel inclined field workings, split furnace, field shchreka, in the excavation area, opening the reservoir with Gezenki, conducting reservoir drift and conducting cleaning operations 2.

The disadvantage of this method is that its use on outburst formations leads to an increase in the risk of mining operations, since the field drift is carried out outside of the anti-blowout measures used in the layer drift, which are conducted in front of the lava, and their execution requires special time.

The purpose of the invention is to increase the safety and efficiency of mining operations by rationalizing the blowout preventive measures in time and space.

This goal is achieved in that according to the method, which includes conducting panel inclined field workings.

split furnace, field drift in the excavation section, gesenka dissection of the reservoir, carrying out of the reservoir drift and conducting cleaning works, prior to conducting the split furnace, the reservoir drift, gesenka and maintaining cleaning works from the inclined field development and field drift to the zone of the split furnace, the drift drift, The gezenka and the treatment works include the drilling of wells, the mouths of which are located along the axes of the workings and, starting from the zone of the split furnace, perform preventive processing of these zones, while the width of the treated zones is determined dissolved condition

B - Su + 2a, where Cf is the width of the split furnace, m;

CX - the width of the treatment zone

beyond the contour of the development, m; + С „+ 2а, where Сш - width of the reservoir drift, m;

Si - protress niche, m; and the amount of advance preventive work relative to treatment is set by the formula

1.HH, H, when UE UACh,

where f is the length of the reference pressure zone (in front of the clearing face,

m / day; ESC rate of clearing

slaughter, m / day;

Vfl- speed of advancement of the front of preventive works, m / day; t is the time of application of the blowout preventer, days. In addition, after the field drive, a discharge zone is established, and the wells for prophylactic treatment of zones are drilled outside the discharge zone. FIG. 1 is a flow chart of the method; in fig. 2 — node I in FIG. one; in fig. 3 is a section A-A in FIG. 2; in fig. 4 section bb in fig. 2; in fig. 5 — node II in FIG. one; in fig. 6 shows a section B-B in FIG. five; in fig. 7 is a cross-section of the FIG. 5. In FIG. marked: 1 - inclined field workings; 2 - protected area; 3 - wells; 4 - incineration furnace; 5 - field drift; 6 - formation drift; 7 - gesenki; 8 - niche; 9 - unloading zone. The method is carried out as follows.

When used on an outburst formation, a panel preparation is carried out for field carrying out inclined workings and excavation drifts (Fig. 1).

The cutting of the clearing face is carried out as follows (Fig. 2-4). A reservoir zone 2 (Fig. 2) is created on the formation along one of the inclined field workings 1, e.g., by executing anti-blowout measures (for example, injecting water into the formation while degassing) through the wells 3 (Fig. 3). As injection wells, for example, two wells 3 are chosen, located at the site relative to the width of zone 2. The width of zone 2 is determined by the formula + 2a, where, Cf is the width of the split furnace, m; О the width of the zone of formation treatment beyond the production contour, m, which, according to the calculation method given in the instructions for safe mining operations on formations prone to sudden outbursts of coal and gas, is set from the parameters of moistening and degassing of coal beds. A split furnace 4 (FIGS. 2 and 4) is not cleaned along the treated zone 2 simultaneously in both directions, then it is dried, preparation of the excavation section is done, and a protected zone 2 is created on the outburst-hazardous formation 5 (FIG. 5) by performing from this drift through the boreholes 3 (Fig. 6) of the anti-blowout measures, as in the previous case. The width of zone 2 is set from the expression B2.Q, H-2a-Cn, where Sf - the width of the reservoir, m; C is the extent of the cleaning hole niche, m. Then, along the treated zone, as the front of the preventive maintenance progresses, the reservoir drift 6, gesenki 7 and niche 8 are carried out (Fig. 5 and 7). At the same time, the cleaning works are being carried out. The amount of advance of the front of preventive work relative to the clearing face is set by the formula L. + 4, -t, where E is the extension of the reference pressure zone ahead of the clearing hole, m; Von-speed of advancement of the clearing flank, m / day; t is the time of application of the blowout preventer. At the same time, the following condition is fulfilled: Vt, Vo4 where Vn-- j is the speed of advancement of the front of the maintenance work in the strip, m / day; Pf - the number of fronts of preventive work in the zone; c is the distance between the pair of well sites, m. Inclined field workings 7 and field drift 5 are held at the minimum possible instruction distance from the outburst formation, which leads to the creation of discharge zone 9, which is not dangerous for emissions. Then, the width of this zone is determined (for example, by laying depth reference points and measuring when they deform the displacements of the lateral rocks). At the same time, the wells 3 are drilled onto the reservoir outside the discharge zone 9. The impact of the reference pressure of the clearing inlet on the field drift 5 is eliminated by the fact that a reservoir drift 6 and its associated niche 8 are held above it. For this, the external walls of the reservoir drift 6 and niches 8 (Fig. 7) are positioned across the reservoir at a distance from the normal to the reservoir through the side walls of the field drift 5, not less than 0.6h, where h is the normal distance from the field drift to the reservoir. At the same time, the width of the excavation of the reservoir is consistent with the width of the specified strip, based on the following relationship; Вг.Си, + Сн + 2а, where Si is the width of the reservoir drift, m; C n is the niche extent, m, which is assumed to be 1.2. The advantage of the method is to improve the safety of work and the pace of workings, which are provided by proactively preventive treatment of the outburst formation in the area of the workings and adjusting the parameters of the applied preventive treatment of the layer with the speed of workings and the treatment works and the size of the discharge zone formed during field drift near outburst formation. In addition, the application of the method makes it possible to improve the state of the field workings by increasing the zone of discharge of the formation using preventive treatment beyond the zone of discharge, which allows increasing the loads on the clearing face.

2

6-5

.but

in-in

Fig.6

Claims (2)

1. METHOD FOR DEVELOPING SINGLE EMISSIBLE COAL PLASES, including panel inclined field workings, a split furnace, field drift at a mining site, opening the formation with gozenki, carrying out a layer drift and conducting treatment work, characterized in that, in order to increase the safety and efficiency of mining works through rational blowout measures in time and space, prior to a split furnace, formation drift, gozenka and treatment works from an inclined field Second generation and field shtre ka to the zone of the split furnace reservoir roadway, winze and conduct cleaning works is drilled, the mouth of which is arranged along axes workings and, starting from the zone of the split furnace, produce preventive treatment of these zones determine the condition wherein the width of the zones to be treated In A With _p + 2A, where With _p - the width of the split furnace, m; cx is the width of the formation treatment zone beyond the output circuit, m; In D С _w + + 2a, where Сw is the width of the formation drift, m; With _n - the length of the niche, m, and the amount of advancing preventive maintenance relative to the treatment is established by the formula L ^ r + Voq-t for V _n ^ Vo ₄ > where E is the length of the zone of reference pressure in front of the face, m / day; V _O u - the speed of movement of the face, m / day; Vn ^{_ the} speed of advancement of the front of preventive work, m / day; t is the time of application of blowout control measures, days. 2. The method according to π. 1, characterized in that after the field drift, a discharge zone is established, and wells for preventive treatment of the zones are drilled outside the discharge zone. Fig 7 SU „„ 1114799