Developing longwall mining under weak geological conditions imposes a substantial challenge with regard to the higher risk of falling roofs. Maintaining stability face in this aforementioned condition is crucial for smooth operation. Investigating roof requires detailed study rock behavior response few key influences. This paper presents outcome numerical analysis shallow depth conditions. A se...

in the new millennium, information technology (it) has become very effective and this is becoming evident in both developed and developing countries. these areas are especially within the fields of information gathering, in the broadest sense, and of developing and strengthening networks both internal and external to the surrounding environment. today, more and more companies, organizations and...

Cables are commonly used for roadway support in coal mines. Traditionally, schemes show characteristics of excessive strength and resource waste; therefore, determining how to scientifically economically arrange the distribution cables is important engineering practice. To obtain best cables, this paper, particle swarm optimization (PSO) algorithm FLAC3D numerical simulation were combined condu...

Understanding the excavation-induced fractured zone (EFZ) around drifts is paramount in context of deep geological disposal for nuclear waste since fractures can introduce pathways migration radionuclides. Drifts Meuse/Haute-Marne Underground Research Laboratory (URL) have been essentially excavated following two main directions major and minor horizontal stresses. Field observations on GCS (pa...

Depressurizing borehole drilling is an effective approach to control the large deformation of deep roadway. It can transfer high stress in proximity roadway into stable rock masses. However, it should be noted that will inevitably cause secondary damage To determine parameters depressurizing boreholes, degree must evaluated properly. Given mass failure unstable phenomenon driven by energy, grea...

Southern Shaanxi region is mountainous and landslide disasters are frequent. Micropile reinforcement technology widely used in management, especially emergency rescue projects, due to easy construction, small soil disturbance, strong site adaptability. Soil arch effect an important prerequisite for safe economic performance of the support function micropile. For swelling accumulation layer sout...