SU1219824A1 - Method of driving workings in outburst-hazardous rock - Google Patents

Description

The invention relates to the mining industry and can be used in the coal industry when conducting operations in existing and construction mines in the outburst of hazardous rocks.

The purpose of the invention is to increase the efficiency and safety of the work by reducing the stress state of the mass and gas pressure.

When excavating the production along the sand-blasted sandstone for the purpose of forecasting along the production axis, the core drills as far as possible, for example, 60 m. The well is located at a point equidistant from the production side in its section. A core is removed from the well, from which the outburst hazardous zones are determined and plotted on the production plan over the entire well depth. Samples of rocks are taken at the bottom of the excavation and from core material and their humidity is determined. If the moisture content of the rocks is lower than the criterion, which indicates the outburst risk of the rocks, then the same well is sealed and the liquid begins to be injected into the massif. In this case, they are sealed in such a way that when the liquid is injected, all the exposed outburst zones are moistened at the same time. When reaching wetness in the bottom of the development of criterion

Editor O. Golovach Order 1307/45

Compiled by G. Vasyuchkova

Tehred A.Aliev Proofreader E.Sirohman

Circulation 436 Subscription VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Branch ShSh Patent, Uzhgorod, st. Project, 4

the values of the pumping are stopped and the excavation of production is commenced in the normal mode, without competitive drilling. The moisture content of the rocks is determined by a moisture meter directly in the face or in the usual laboratory way.

Under mine conditions, the reference pressure zone — its maximum is ahead of the bottom hole by 1-2.5 m, depending on the section, rock structure and depth of development. With the approach of the maximum of the reference pressure to the previously treated zone at 5-7 m penetration

stopped, moisture sample taken. If the humidity is below the critical, continue to inject fluid into the same well until the criterion value is reached, after which

continue sinking. Then, at the approach of downhole generation, at 2–5 m to the out-of-danger zone, the moisture in the bottom is re-controlled and, if it is below the critical, again

The pump is injected to exceed a critical value, after which work is continued and it enters the humidified outburst zone. Further work continues, repeating all operations in the same sequence over the entire length of the well. After the development has been drilled for the entire length of the core well, it is extended. to the maximum possible length and work lead in the same order.

Claims (1)

METHOD FOR PRODUCING EMISSIONS, including forecasting the outburst hazard of zones, drilling wells, injecting fluids into wells, determining criteria for moisture values and generating resonant waves in them, characterized in that, in order to increase the efficiency and safety of work by reducing the stress state of the array and gas pressure, before starting mining on the production axis in the direction of its conduct, drill a core well of the maximum possible length, which, as the mountains They extend, establish the presence of outburst-hazardous aeons along its length and seal the core well in areas to be moistened, which are simultaneously pumped into the installed outburst-hazardous zones, while the injection of fluid is carried out until the bottom reaches the criterion of humidity, and when the mine is drilled and when the maximum of the mountain pressure approaches the previously treated zone for at least 5-7 m, humidity is measured and its value is compared with the criterion if humidity is less than critical, additional injection of fluid is carried out into the core well, and moisture is re-controlled when approaching the bottomhole to the previously worked out hazardous area by at least 2-5 m, and at humidity below the criterion, injection is resumed and conducted until the moisture value is reached, exceeding the criteria. SU, ... 1219824>