SU949201A1 - Method for relieving and degassing rock mass - Google Patents

Description

The invention relates to mountainous importance and can be used to combat sudden coal and gas emissions.

There is a method of creating a protective effect by trimming a coal seam with a wire saw. In this method, part of the coal strip is mechanically destroyed during production.

However, this method is characterized by a slight protective effect and can be used to protect the reservoir itself.

Closest to the invention is a method of creating a protective action by developing an adjacent (protective) formation. The method envisages rock mass in a certain area with the formation in the massif of a flat slot at the full thickness of the reservoir. As a result of unloading and degassing of the outburst formation in the field of the protective effect, a reduction in the mountain and gas pressures in it is achieved}.

The disadvantages of this method are the large amount of preparatory work (opening and preparation) and the laboriousness of the cleaning works and the coal transport station are high. Therefore, in conditions of low-thickness plastose, in geological disturbances, coal delicacies and in difficult-to-reach areas where the labor intensity and cost of extraction are not used, protective mining of the layers is not used.

The purpose of the invention is to reduce the complexity of work when working as a protective reservoir of low power and working out areas of geological disturbances and

15 plots ang.

Claims (2)

This delta is achieved by the fact that, according to the method of unloading and degassing of the rock mass, the advancing branch is carried out by casting a pair of knocked down wells between each other on protective pst, delight between them by firing by burning coal using oxygen mixture and passing through the wells through the wells. burning. Moreover, the fire slaughter is conducted by passing and counter-igniting pairwise knocking wells. First, the fire face is in the mode of coal gasification. FIG. Figure 1 shows the scheme of the implementation / uni of the method of unloading and degassing of the massif, - by 4 g. 2 - the same, by burning coal. The recess zone 1 in the thin reservoir 2 creates a protective aoj 3 to provide safe conditions for the drift 4 in the outburst zone 5. To burn coal within the protective cavity I from the drift 6, drill holes 7-12, etc. along the contour of the planned perimeter of generation. Certain squice pairs are knocked together by the well-known Toaaivni modules, for example, hydraulic fracturing, and form fire faces 13 and 14 by blowing air or an oxygen mixture through wells 7–8–9 and suctioning products mount through these wells. In order to increase the rate of burnout of the protective cavity, one can influence a practically unlimited number of firing faces. The diagram below shows two slaughterhouses operating according to the overtaking scheme. The mechanism of protective burning of coal is similar to the usual method of extracting coal from the reservoir, with the difference that when burned, it provides only a partial extraction of the mass of the coal substance. This circumstance should be taken into account at cueiiKe of the effectiveness of the protective action by introducing rIOpravaya coefficient coefficients to the value of the thickness of the reservoir, taking into account the residual volume of ash at the place of combustion. The unloading process using the tool is manageable. Thus, the use of coal gasification at temperatures of 25 ° –9 OES ensures the release of volatile, water and tar, while burning the mass of coal de-energizes with no more than 40–50%. However, under certain conditions (greater reservoir thickness or conditions for creating a local area protection), this is sufficient to ensure reliable protection of the hazardous formation. Conducting work in this mode gives an additional effect from the generation of energy or process gases. In order to increase the discharge effect (protective affect), it is necessary to ensure a more complete burning of the hot mass with only non-combustible residues, ash, remaining in the hearth. Technologically, this is accomplished by increasing the percentage of oxygen in the mixture and bringing the combustion temperature to 120r-1500 C. In order not to lose the effect of the generation of energy gases, combustion can be carried out in two stages: first in the gasification mode, and then complete combustion coal va thing. The application of the method gives a significant economic effect due to the improvement of the state of production and development, unloaded from the mountain pressure, the abolition of measures to combat sudden outbursts, by the student of additional fuel during gasification. Claim 1. Method of unloading and degassing of rock mass, including advanced development of adjacent protective formation, characterized in that, in order to reduce the complexity of work when working as a protective layer of low power and when working on areas of geological disturbances and coal delicacies, advanced development was carried out by drilling to a protective stratum of a series of wells, which are knocked down in pairs between each other, form a bottomhole between them by burning coal using rut oxygen mixture and sucking it through a well zhiny combustion products. 2. The method according to claim I and the fact that the firing of the face is carried out by means of igniting in pairs of knocked wells, 3. The method according to item I, and with so that the fire face is led by counter-ignition in pairs we knock down wells. 4. The method according to claim 1, about tl and h and y and with the fact that at first the fire face believe in coal gasification mode. Sources of information taken into account during the examination 1. D. Dorokhov, V. S. Charov. Changing the initial gas emission rate and coal strength. undercut zone in hazardous area. Coal of Ukraine, 1974 / N 6. 2.Instu ukdi on the safe conduct of mining operations on formations prone to sudden emissions of coal, rock and gas, M., “Nedra, 1977, p. 38 (prototype).