Continuous drilling flowrate process capable of predicting coal draft outburst and its apparatus

Abstract

The present invention is continuous drilling flow rate capable of predicting coal draft outburst and its apparatus. By means of the method of drilling holes in the coal bed drilling direction for data acquisition and the apparatus comprising hole sealing capsule unit, solid-gas separator, filter, coal bit controller, electric rock drill with connected displacement sensor LXC, controller unit KZ with explosion resistant enclosure and connected computer data acquisitor SC, the present invention can determine the gas distribution in the drilling direction, obtain the gas flow rate distribution curve along the drilling depth during coal bed drilling process, so as to determine the distance of soft coal containing high pressure gas to the ground, judge the distance to the place with maybe outburst. The present invention has compact reasonable structure, high accuracy and stable and reliable measurement result, and may be used widely.

Description

technical field [0001] The invention relates to a continuous drilling flow rate method and a device thereof for predicting coal roadway outburst, and is especially suitable for measuring the risk of coal roadway outburst. Background technique [0002] As we all know, coal and gas outburst is a dynamic phenomenon that occurs in soft coal containing high-pressure gas. Once outburst occurs, it often endangers the lives of coal miners. Coal roadway excavation is a labor process carried out in soft coal seams, and coal and gas outbursts are often encountered. It is very important to predict coal roadway outbursts to avoid outburst hazards. At present, the coal roadway outburst prediction methods commonly used in the underground are: 1) the initial velocity method of drilling gas emission; 2) the R value index method; 3) the cuttings index method. The characteristic of these methods is to measure the index of a certain point in front of the coal ...

AI Technical Summary

Problems solved by technology

Although these methods have a certain reference value, they are not accurate, and some cases even have low indicators and outstanding cases, causing serious casualties and causing serious psychological panic to the workers who went down the well.

The results measured by these "point prediction" methods cannot reflect the actual distribution of the pressure relief zone in front of the working face of the coal roadway, and thus cannot accurately predict the outburst danger of the working face of the coal roadway. Domestic scholars have also provided a set of continuous measurement coal roadway There are similar predictive devices for parameters such as cuttings volume, drilling power, cuttings gas flow rate, and gas concentration during the drilling process of the working face, but there is no device for directly measuring the gas flow distribution during continuous drilling.

Images