Research Article

Mechanical Properties and Control Rockburst Mechanism of Coal and Rock Mass with Bursting Liability in Deep Mining

Table 1

Prepeak linear elastic modulus Ee and postpeak linear descending modulus Ed of the roof, the floor, and the coal specimens under different confining pressures.

Specimen typeConfining pressure (MPa)Ee (MPa)Ed (MPa)Ee/Ed

Roof012715.23268269.850.0474
313019.27146717.210.0887
512982.6890953.370.1427

Floor013425.16172543.630.0778
310280.5771496.940.1438
513379.6785424.080.1566

Coal02607.642028.541.2855
33551.072144.201.6561
54428.882568.311.7244