RU2130556C1 - Method for predicting outburst-danger of rock - Google Patents

Abstract

FIELD: mining industry. SUBSTANCE: according to method, bore-holes are drilled in rock of mine field sections being investigated. These sections are chosen according to known geological characteristics. Determined are specific properties of emitting gases using smell sensing instrumentation. Made up is base of smells of mine gases which characterize traces of chemical elements contained in them. Then, artificial outburst is initiated by means of shaking explosion. If outburst takes place, earlier detected smells are considered as extreme. In further investigation of zones of geological disturbance by means of drilling, actual smells are compared with standard base of extreme values. If they are identical or exceed extreme values, rock mass in given zone is related to outburst-risky. Application of aforesaid method improves safety of mining operations. EFFECT: higher efficiency.

Description

 The invention relates to the mining industry and can be used to determine the degree of outburst hazard of rocks.

 There is a method of determining the outburst hazard of reservoirs of potash salts, which consists in measuring the content of normal butane and its isomer in the samples [1].

 The disadvantage of this method is the inoperability of this forecast due to the need to study samples in the laboratory.

 There is a method for predicting the outburst hazard of rocks, which consists in establishing the outburst hazard of a site by changing the water content and (or) organic component in the samples compared to extreme values that are considered the base [2]. The disadvantage of this method is the great complexity and complexity of determining these indicators and the significant investment of time for research on chemical analysis of samples.

 Closest to the proposed invention is a method for determining the outburst hazard of zones of coal seams, adopted as a prototype [3], which consists in interval drilling of holes, measuring in each interval the initial outgassing rate and critical value of outgassing, determining the yield of volatile substances and estimating the outburst hazard of the zones by the difference between the release of volatiles in a hazardous and non-hazardous area. The disadvantage of this method is the high cost of time for its implementation and the high complexity of the measurements, which reduces the safety of work.

 The objective of the invention is to increase the safety of mining by improving the accuracy and efficiency of determining the outburst hazard of rocks.

 The solution to the problem is achieved by drilling holes in the rocks of the investigated section of the mine field, determining the characteristics of the properties of the gas emitted at the same time, and establishing the outburst hazard of the rocks by changing the obtained parameters, and is characterized by the fact that they first create a reference base of smells of mine gases in the boreholes of outburst hazardous areas, in this case, the characterization of the properties is carried out by identifiable odors of gases containing traces of chemicals, and when they coincide or exceed In terms of base indicators, rocks are considered outlier hazardous.

 The method is as follows. In the rocks of the tested hazardous zone, usually determined by geological features, for example, by changing the hypsometry of the occurrence of a mineral deposit or by visually determining the degree of metamorphism of the rocks; outburst packs are determined by color, gloss, structure, degree of disturbance [4, 5], research bore holes are drilled up to 6 meters long. Then, after removing the drilling tool, an odor detector device sensor [6] is installed in the hole and a mine odor is recorded, after which a shock-blowing of rocks in the hazard zone is performed [4, 5], if rock and gas are ejected, then the smell is considered extreme and put in the base. Later, at the intersection of various disturbed zones, holes are drilled and the smells of gases released from the hole are identified with a reference base, and the outburst hazard of the rocks is determined when they coincide or exceed the extreme values of the base. Measurement and comparison are carried out using an odor determinant device, for example [6].

 Literature.

 1. A. S. 994767 (USSR) V.I. Galkin, A.I. Kudryashov "Method for determining the outburst hazard of formations of potash salts" MKI E 21 F 5/00, C 39/00 BI N 5, 1983, p. 157.

 2. Patent RU N 2002062 V.I. Pavlov "Method for predicting the outburst hazard of rocks" E 21 F 5/00, BI N 39-40, 1993, p. 109.

 3. SU 1082970 M.I. Bolshinsky, V.S. Mayevsky, E.I. Timofeev "A method for determining the outburst zones of coal seams" E 21 F 5/00, BI N 12, 1984.

 4. N.M. Proskuryakov, “Sudden emissions of rock and gas in potash mines,” M., Nedra, 1980, 264 pp.

 5. Instructions for the safe conduct of mining operations on formations hazardous for sudden emissions of coal, rock and gas. M., 1989, IHD them. A.A. Skochinsky, s. 27-28, 111, 117.

 6. Chemical Engineering "The human nose finds its rival in an electronic aroma detector", November, 1995 Volume 102, N11.

Claims (1)

 A method for predicting the outburst hazard of rocks, including drilling holes into the rocks of the mine area under investigation, determining the characteristics of the properties of the gas emitted at the same time, and determining the outburst hazard of the rocks by changing the obtained parameters, characterized in that they first create a reference base of mine gas odors in the outbursts of outburst hazardous areas, and characterization of properties is carried out by identifiable odors of gases containing traces of chemicals, and when they coincide or pre Above extreme base indicators, rocks are considered outlier hazardous.