Mining Production Safety Management Exam Question Generation

Please generate 5 situational questions based on the following on-site scenarios:
1) Work face gas concentration at 0.9% for 3 minutes
2) Water accumulation in the tunnel with continuous seepage
3) Local roof pressure, abnormal initial support force
4) Incomplete discharge of blasting fumes after explosion
5) Belt conveyor electrical control system tripping multiple times

Requirements: Provide a standard list of disposal steps for each question (numbered subpoints), list key thresholds and prohibited operations, and reference the relevant regulations/procedures section numbers. Return JSON with the same fields.