Center of rock pressure control Ltd, Saint-Petersburg, Russia:

Rogachkov A. V., Technical Officer, Candidate of Engineering Sciences, arogachkov84@mail.ru

I'll condition of temporary roadways in coal mines is one of the reasons for the lower reliability of performance of basic mining subsystems. The practice of rock bolting used to ensure stability of temporary roadways shows that the rock bolting technology needs improvement and calls for the new procedures, regulations and estimation criteria in order to provide conformity between the ground support designs and the ground support standards. The observation data on the condition of walls and support in temporary roadways in coal mines in Kuzbass show that the true condition of the temporary roadways sometimes disagrees with the mine project. These findings can have aggravating effect on the further operation of the temporary roadways in coal mines. The instrumental monitoring and visual inspection have shown that the increase in the width of a temporary roadway by 15% and more as compared with the mine project can result in emergency situations. With the aim to enhance coal mine safety and efficiency, rock bolting should be considered as the mine support system at the stage of mine project, and a new regulatory document should be developed to perform observation, monitoring and estimation of the condition of walls and support in temporary roadways. According to the elaborated and approved regulations, the auditing of the conformity between the support designs and the support standards should be carried out at least once a year.

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