Method of inversion of outburst main control parameters using gas emission data during coal seam drilling construction

Abstract

The invention relates to a method for inverting outburst main control parameters by using gas discharge data in coal seam drilling construction, and belongs to the field of coal mine dynamic disasterprediction and forecast. The method for inverting the outburst main control parameters by using the gas discharge data in the coal seam drilling construction comprises the steps that a water slaggingmode or a wind slagging mode is adopted in an underground coal mine excavation working face to construct gas parametric measurement or gas extraction drilling; an irony slim tube is stretched into a drilling hole along the drilling hole wall by using chambering effect during drill bit drilling, and air is supplied to the interior of the drilling hole; differential pressure on the two sides of theirony slim tube is accurately measured by a digital display type differential pressure sensor, so that the supply air volume is calculated; the drilling gas discharge desorption volume under the conditions of water slagging and wind slagging is calculated in combination with data such as gas density and air volume of drilling sites, and the gas discharge desorption volume indirectly reacts difference of coal body physical and mechanical properties; and rapid prediction and forecast are carried out on outburst risk of drilling site gas. According to the method for inverting the outburst main control parameters by using the gas discharge data in the coal seam drilling construction, rapid prediction of the underground outburst risk can be realized, and a scientific method and advanced technical support are provided for mine ventilation gas safety.

Description

technical field [0001] The invention relates to the field of prediction and forecasting of coal mine dynamic disasters, and specifically designs a method for retrieving prominent main control parameters using gas gushing data during coal seam drilling construction. Background technique [0002] Underground gas drainage in coal mines is the most important means of gas disaster prevention and control, and drilling engineering is an important part of pre-drainage measures for coal seam gas. At this stage, coal mines simply construct boreholes for gas drainage or coal seam parameter measurement. Due to poor implementation of safety measures during drilling construction, gas over-limit accidents occur from time to time, and there is a lack of synchronous risk judgment during drilling construction. knowledge means. Coal seam gas parameter measurement and other work is to take coal samples for laboratory measurement after the drilling construction is completed. In this process, it...

AI Technical Summary

Problems solved by technology

At this stage, coal mines simply construct boreholes for gas drainage or coal seam parameter measurement. Due to poor implementation of safety measures during drilling construction, gas over-limit accidents occur from time to time, and there is a lack of synchronous risk judgment during drilling construction. knowledge means

Coal seam gas parameter measurement and other work is to take coal samples for laboratory measurement after the drilling construction is completed. In this process, it is very easy to be affected by error factors, so the accuracy of the measurement results cannot be guaranteed, and there is a lack of potential in the drilling process. Research and Application of Highlighting Main Control Parameters

The measurement of gas emission from boreholes is obtained after the completion of the borehole construction, through the grouting and sealing of the holes, and is obtained by observing the equipment. The whole process is cumbersome to operate, with high requirements on the process and poor timeliness.

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