Research on Control of Rib Spalling Disaster in the Three-Soft Coal Seam

Table 2

Equipment and materials required for drilling construction.

Equipment required for drilling		Equipment and parameters required for grouting
Drilling rig	ZQS-50/1.6S pneumatic handheld drill for coal mine	Pump and parameters	Pneumatic special multifunctional grouting pump
Drill pipe	Φ = 38 mm ∗ 1000 mm twist drill pipe	Dynamic parameters	Mine air pressure 0.4∼0.7 MPa, air volume not less than 5 m^3/min
Drill	Φ = 42 mm	Other spare parts	Extension pipe, blocker, flexible grouting pipe, mixing gun, high pressure feeding pipe
Connect the pipeline	Φ = 19 mm high pressure connecting pipe; Φ = 19 mm sealing ring