Just updated to 2.3a-1.11.2 and everytime I go to mine redstone my server crashes.

From the looks of it the issue is the Rhodochrosite dropping. Here is a copy of the crash log.

java.lang.NullPointerException: Exception in server tick loop at nc.handler.DropHandler.addBlockDrop(DropHandler.java:40) at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_1083_DropHandler_addBlockDrop_HarvestDropsEvent.invoke(.dynamic) at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:90) at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:185) at net.minecraftforge.event.ForgeEventFactory.fireBlockHarvesting(ForgeEventFactory.java:271) at net.minecraft.block.Block.func_180653_a(Block.java:559) at net.minecraft.block.BlockRedstoneOre.func_180653_a(BlockRedstoneOre.java:94) at net.minecraft.block.Block.func_176226_b(Block.java:550) at net.minecraft.block.Block.func_180657_a(Block.java:722) at net.minecraft.server.management.PlayerInteractionManager.func_180237_b(PlayerInteractionManager.java:330) at oreexcavation.handlers.MiningAgent.tickMiner(MiningAgent.java:229) at oreexcavation.handlers.MiningScheduler.tickAgents(MiningScheduler.java:143) at oreexcavation.handlers.EventHandler.onTick(EventHandler.java:178) at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_552_EventHandler_onTick_ServerTickEvent.invoke(.dynamic) at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:90) at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:185) at net.minecraftforge.fml.common.FMLCommonHandler.onPostServerTick(FMLCommonHandler.java:265) at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:668) at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:149) at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:482) at java.lang.Thread.run(Thread.java:748)

Yeh, I made a mistake - could you see if this works? Just a quick fix:
https://www.dropbox.com/s/h93m87lzew1j7m4/NuclearCraft-2.3aFixaroo--1.11.2.jar?dl=0

Basically, I added a check to see if the tool the player is using has silk touch, and it NPEed when the item didn't have any enchantments.

Yes that version works great.

Awesome - I'll get an official fix out soon :)

is there a possibility you could fix it for 1.10.2 as well? cause it's happening on that version as well

Yep, there will be a fix out shortly - I just happen to be halfway through a rewrite of the recipe system, so the timing of my error was a little unfortunate :P