Genetic Programming-Based Prediction Model for Microseismic Data

Table 1

Lithology of roof and floor slate of coal seam in 12090 working face.

Title		Rock	Thickness/m	Lithology
Roof	Main roof	Dazhan sandstone	3~12.1	Deep gray, gray black, quartz mainly argillaceous cementation thick layer; local microsandy mudstone.
	Immediate roof	Sandy mudstone	4~10.9; average 7.4	Deep gray, gray black, medium-thick stratiform mica flakes, and carbonaceous local sandy mudstones containing fossil plants.
	False roof	Mud or sandy mudstone	0.5~3; average 1.7	Soft, broken, and easy to fall.
Floor	Immediate floor	Mud or sandy mudstone	0~2.6	Black ash, black, thin-layer carbonaceous, and plant fossils, undulating. It may have an impact on recovery.
	Main floor	Sandy mudstone or fine sandstone	3.1~8.3	Gray black, gray, pyrite-bearing nodules and argillaceous bands visible in large quantities of pyrite nodules and siderite nodules.