Coal kiln goaf exploration method

Abstract

The invention provides a coal kiln goaf exploration method, which comprises the following steps of carrying out plotting, and measuring a coal mine kilneye to obtain an exploration range of a goaf, analyzing whether the projection of the coal seam on the earth surface intersects with the line scheme of the linear engineering according to the plotting result, and carrying out groove exploration, correspondingly arranging surface geophysical exploration lines according to a groove exploration result, analyzing the geophysical exploration interpretation result, arranging drill holes according to the geophysical prospecting interpretation result, and verifying whether the coal kiln has a goaf, and if the goaf exists, conducting in-hole camera shooting on the drilled holes after hole finishing, acquiring in-hole stratum distribution, conducting comparative analysis on the in-hole stratum distribution and the core identification result of each drilled hole, and finally determining the goaf distribution depth and the goaf distribution thickness. According to the method, the mining depth and thickness of the goaf are accurately found out through the methods of regional geological analysis, kiln mouth earth surface measurement and positioning, groove exploration, geophysical exploration, drilling, in-hole camera shooting and the like, and reasonable suggestions are provided for line scheme selection.

Description

technical field [0001] The invention relates to the technical field of railway engineering geological survey, in particular to a method for surveying gobs of coal kilns. Background technique [0002] Coal mine goaf is one of the important unfavorable geological problems encountered in the planning and construction of railway projects. The goaf of large-scale mines generally has a wide distribution area, large mining thickness, obvious settlement deformation, and strong hazards. Surface settlement observation is used. Exploration methods such as geophysical prospecting, drilling, and in-hole measurement can more accurately identify the boundaries and properties of goafs, and provide evidence for the passage of railways outside the influence of large-scale goafs. Due to the distribution and conditions of coal seams, small coal kilns for private mining by collectives or individuals are usually mined from the outcrop of surface coal seams. The mining time is long and closed for ...

AI Technical Summary

Problems solved by technology

Due to the distribution and conditions of coal seams, small coal kilns for private mining by collectives or individuals are generally mined from the outcrop of surface coal seams. The mining time is long, closed for many years, and the mining thickness is small. , surface subsidence and deformation are small, it is difficult to effectively find out its distribution characteristics by directly copying the survey method of large-scale mined-out areas